Only time I've had this issue, is when I don't code the selective locking off.
VCDS -> 46. Cent Convenience -> Coding -> Change 00016 to 00017 and save.
One press unlocks the entire car. And it stays unlocked until you lock it/if you don't open anything. It will self lock.
The latch has two positions, might need to adjust the bump stops on the tailgate
AND OR
Latch-actuator so it doesn't get stuck half way.
Hope this helps a bit
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